How to crush dog food?

DogsHow to crush dog food?, My vet has prescribed the Royal Canin Early Cardiac Veterinary Diet dry dog food, but the pieces are too large for my 11-year-old Maltese to manage. Aside from chopping it ...

My vet has prescribed the Royal Canin Early Cardiac Veterinary Diet dry dog food, but the pieces are too large for my 11-year-old Maltese to manage. Aside from chopping it up piece by piece with a knife, what's the best way to crush the food into smaller pieces, without making a big powdery, crumbly mess? (I have a juice blender but not a food processor.)